TY - CPAPER AU - Martin Leutbecher BT - Seminar on Recent developments in data assimilation for atmosphere and ocean, 8-12 September 2003 CY - Shinfield Park, Reading DA - 2003 LA - eng PB - ECMWF PP - Shinfield Park, Reading PY - 2003 SP - 393 EP - 416 T2 - Seminar on Recent developments in data assimilation for atmosphere and ocean, 8-12 September 2003 TI - Adaptive observations, the Hessian metric and singular vectors ER -